Quote:
Originally Posted by Ben710
Thanks for the information mate, good stuff. Really enjoyed sucking up the info. How would you describe the 955 engine compared to the SPS? Since you said it was a corse spec engine, IŽd guess youŽd have the rev limit over 11500? Because any SPS will do that in stock trim, at least mine did with the 073 eprom.
15 lbs is the starter motor and the alternator + flywheel?
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It seems Revs, more that anything else, are the death of Desmoquattro motors. While the 955 with 431 and G's would still be making power beyond 11,500 I couldn't afford to rebuild after every race meeting. And cases are expensive and I cracked a couple sets of those over the years. I think the factory 955 Racing manual calls for replacement cases every 1000km!
That's why I don't rev the SPS over 10,200.
One of the big differences is the CR gearbox. That makes an engine feel like a race engine. That and the lightweight internals. I transfered the lightweight flywheel, gears, and put a lightweight alternator in the SPS but I'd guess the crank is still heavier than the corse one.
Add a starter, starter gears, sprang, wiring and a bigger battery, plus the 996 motor is heavier to begin with and it's easy to pick up the 13 additional pounds I measured. I only wish I hadn't gained 20lbs too since I quit racing!